/Engine/Source/Runtime/MeshDescription/Public/MeshDescriptionBase.h
Returns reference to an array of Triangle IDs connected to this vertex instance
void GetVertexInstanceConnectedTriangles ( [FVertexInstanceID](API\Runtime\MeshDescription\FVertexInstanceID) VertexInstanceID, [TArray](API\Runtime\Core\Containers\TArray)< [FTriangleID](API\Runtime\MeshDescription\FTriangleID) > & OutConnectedTriangleIDs ) const